IV 
Index of Subjects 
Laboratory Notes: 
(1) See Bench Light ..... 
(2) See Multiple Switch ..... 
(3) See Projection Microscope .... 
(4) See Respiroscope ..... 
Lichens , by Annie Lorrain Smith [Review]—W. Watson 
Multiple Switch and Commutator for Thermocouples, A (Labora¬ 
tory Note) (1 Text-fig.)—H. J. Denham . 
Mycologists, Notices to— 
(1) The Lister Institute National Collection of Type Cultures 
(2) Continuation of Saccardo’s Sylloge Fungorum 
Osmotic Pressure, see Permeability 
Periodicity of Freshwater Algae in Nature, A Study of some of the 
Factors controlling the—(concluded) (2 Text-figs.)—W. J. Hod- 
getts ....... 
Permeability—Walter Stiles 
VI. Osmotic Pressure ..... 
VII. The Cell Wall ..... 
VIII. The Plasma-Membrane .... 
IX. The Water Relations of the Plant Cell 
X. The Influence of External Conditions on the Intake 
and Excretion of Water by Plant Cells and Tissues 
Phrenology, Studies in, No. 3 (1921) (with Tables)—Sir Francis 
Darwin ....... 
Plasma-Membrane, The, see Permeability 
Primula elatior x vulgaris , The origin of the hybrid, demon¬ 
strated experimentally in the field, with notes on other British 
Primula hybrids—Miller Christy .... 
Primula vulgaris , see Primula elatior 
Projection Microscope, The (Laboratory Note)—H. J. Denham . 
Protoplasmic Streaming, A method for inducing—William Seifriz 
Respiroscope, A Simple (Laboratory Note)—Sydney J. Mangham 
Root Pressure, Further Observations upon the Mechanism of— 
J. H. Priestley ...... 
Second or Autumnal Flowerings of Plants, Records of—Sir 
J Francis Darwin and A. Shrubbs . . 
Sylloge Fungorum , Continuation of Saccardo’s—(Notices to Myco¬ 
logists) ....... 
PAGE 
231 
166 
163 
230 
102 
166 
232 
232 
*5 
49 
140 
169 
233 
34 
293 
163 
107 
230 
4 i 
48 
232 
